/*

 * Licensed to the Apache Software Foundation (ASF) under one

 * or more contributor license agreements.  See the NOTICE file

 * distributed with this work for additional information

 * regarding copyright ownership.  The ASF licenses this file

 * to you under the Apache License, Version 2.0 (the

 * "License"); you may not use this file except in compliance

 * with the License.  You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

package com.bff.gaia.unified.sdk.extensions.gcp.util;



import com.google.api.client.http.GenericUrl;

import com.google.api.client.http.HttpResponse;

import com.google.api.client.http.HttpResponseInterceptor;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;



import java.io.IOException;



/**

 * Implements a response intercepter that logs the upload id if the upload id header exists and it

 * is the first request (does not have upload_id parameter in the request). Only logs if debug level

 * is enabled.

 */

public class UploadIdResponseInterceptor implements HttpResponseInterceptor {



  private static final Logger LOG = LoggerFactory.getLogger(UploadIdResponseInterceptor.class);

  private static final String UPLOAD_ID_PARAM = "upload_id";

  private static final String UPLOAD_TYPE_PARAM = "uploadType";

  private static final String UPLOAD_HEADER = "X-GUploader-UploadID";



  @Override

  public void interceptResponse(HttpResponse response) throws IOException {

    if (!LOG.isDebugEnabled()) {

      return;

    }

    String uploadId = response.getHeaders().getFirstHeaderStringValue(UPLOAD_HEADER);

    if (uploadId == null) {

      return;

    }



    GenericUrl url = response.getRequest().getUrl();

    // The check for no upload id limits the output to one log line per upload.

    // The check for upload type makes sure this is an upload and not a read.

    if (url.get(UPLOAD_ID_PARAM) == null && url.get(UPLOAD_TYPE_PARAM) != null) {

      LOG.debug(

          "Upload ID for url {} on worker {} is {}",

          url,

          System.getProperty("worker_id"),

          uploadId);

    }

  }

}